Cita APA (7a ed.)

Ray, J. (1980). Discovery and exploration (1. publ.). Heinemann.

Cita Chicago Style (17a ed.)

Ray, John. Discovery and Exploration. 1. publ. London [u.a.]: Heinemann, 1980.

Cita MLA (9a ed.)

Ray, John. Discovery and Exploration. 1. publ. Heinemann, 1980.