Cita APA (7th ed.)

Robertson, P. (1974). The book of firsts. C. N. Potter.

Cita Chicago (17th ed.)

Robertson, Patrick. The Book of Firsts. New York: C. N. Potter, 1974.

Cita MLA (9th ed.)

Robertson, Patrick. The Book of Firsts. C. N. Potter, 1974.