Cita APA (7a ed.)
Polivka, R. P., & Pakin, S. (1975). APL: The Language and its usage. Prentice Hall.
Cita Chicago Style (17a ed.)
Polivka, Raymond P., y Sandra Pakin. APL: The Language and Its Usage. Englewood: Prentice Hall, 1975.
Cita MLA (9a ed.)
Polivka, Raymond P., y Sandra Pakin. APL: The Language and Its Usage. Prentice Hall, 1975.
Precaución: Estas citas no son 100% exactas.