APA (7th ed.) Citation

Hampshire, N. (1982). Library of PET subroutines. Hayden Book Co..

Chicago Style (17th ed.) Citation

Hampshire, Nick. Library of PET Subroutines. Rochelle Park, N.J.: Hayden Book Co., 1982.

MLA (9th ed.) Citation

Hampshire, Nick. Library of PET Subroutines. Hayden Book Co., 1982.