Albuquerque, U. (1996). penguin India: Career guide: The sciences. Penguin Books.
Chicago Style aipamenaAlbuquerque, Usha. Penguin India: Career Guide: The Sciences. New Delhi: Penguin Books, 1996.
MLA aipamenaAlbuquerque, Usha. Penguin India: Career Guide: The Sciences. Penguin Books, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.