APA (7th ed.) Citation

Clark, R. W. (1964). Explorers of the world. Aldus books.

Chicago Style (17th ed.) Citation

Clark, Ronald William. Explorers of the World. London: Aldus books, 1964.

MLA (9th ed.) Citation

Clark, Ronald William. Explorers of the World. Aldus books, 1964.

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