The basic format would be:
Last Name Initials[period] Title[period] Place[colon] Publisher[semi-colon] Year[period] # of pages [p period]
The basic rules for citing do not differ for internet items from what is required for print. Simply listing a URL is not sufficient
APSnet: plant pathology online. St Paul (MN): American Phytopathological Association: c1994-2005 [accessed 2005 Jun 20]. http://www.apsnet.org/.
Page within a website
Kishbaugh K. What you need to know about paying for veterinary school. American Veterinary Medical Association. 2015. [accessed 2015 Jun 20]. http://atwork.avma.org/2015/10/22/what-you-need-to-know-about-paying-for-veterinary-school/.
Book by a single author
Sherman, C. The invisible Web : uncovering information sources search engines can't see. Medford, N.J.: CyberAge Books, Information Today; 2001. 439 p.
Book by two or more authors
Voet D, Voet JG. Biochemistry. New York: J Wiley; 1990. 1223 p.
Book with editors
Gilman AG, Rall TW, Nies AS, Taylor P, editors. The pharmacological basis of therapeutics. 8th ed. New York: Pergamon; 1990. 1811 p.
Griffiths AJF, Miller JH, Suzuki DT, Lewontin RC, Gelbart WM. Introduction to genetic analysis. 7th ed. New York (NY): W. H. Freeman & Co.; c2000 [accessed 2005 May 31]. http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=iga.
Chapter within a book
Kuret JA, Murad F. Adenohypophyseal hormones and related substances. In: Gilman AG, Rall TW, Nies AS, Taylor P, editors. The pharmacological basis of therapeutics. 8th ed. New York: Pergamon; 1990. p 1334-60.
Anders, A. Effects of large-scale climate on avian population dynamics across species' North American breeding distributions [dissertation]. [University Park, (PA)]: Pennsylvania State University; 2008.
IMGT/HLA Sequence Database. Release 2.9.0. Cambridge (England): European Bioinformatics Institute. 2003- [updated 2005 Jun 1; accessed 2005 Jun 22]. http://www.cbi.ac.uk/imgt/hla/.