Cita APA (7th ed.)

Kirchshofer, R. (1968). The world of zoos: A survey and gazetteer. Batsford.

Cita Chicago (17th ed.)

Kirchshofer, Rosl. The World of Zoos: A Survey and Gazetteer. London: Batsford, 1968.

Cita MLA (9th ed.)

Kirchshofer, Rosl. The World of Zoos: A Survey and Gazetteer. Batsford, 1968.