APA (7th ed.) Citation

Geyl, P. (1961). Encounters in history / by P. Geyl. Collins.

Chicago Style (17th ed.) Citation

Geyl, P. Encounters in History / by P. Geyl. Collins, 1961.

MLA (9th ed.) Citation

Geyl, P. Encounters in History / by P. Geyl. Collins, 1961.

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