Cita APA

Ratzel,, . F. (1989). History of mankind: Vol.2. Radha Publication.

Citación estilo Chicago

Ratzel,, Friedrich. History of Mankind: Vol.2. Delhi: Radha Publication, 1989.

Cita MLA

Ratzel,, Friedrich. History of Mankind: Vol.2. Radha Publication, 1989.

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