Cita APA (7a ed.)

Katzan, H. (1971). APL user's guide. Van Nostrand Reinhold Company.

Cita Chicago Style (17a ed.)

Katzan, Harry. APL User's Guide. New York: Van Nostrand Reinhold Company, 1971.

Cita MLA (9a ed.)

Katzan, Harry. APL User's Guide. Van Nostrand Reinhold Company, 1971.