Cita APA

Niven, L. (1968). World of Ptavvs. Macdonald.

Citación estilo Chicago

Niven, Larry. World of Ptavvs. London: Macdonald, 1968.

Cita MLA

Niven, Larry. World of Ptavvs. Macdonald, 1968.

Warning: These citations may not always be 100% accurate.