Cita APA

Holttum, R. E. 1. (1968). Ferns of Malaya (Second edition.). Singapore: Government Print Office.

Citación estilo Chicago

Holttum, Richard Eric 1895-. Ferns of Malaya. Second edition. Singapore: Government Print Office, 1968.

Cita MLA

Holttum, Richard Eric 1895-. Ferns of Malaya. Second edition. Singapore: Government Print Office, 1968.