APA (7th ed.) Citation

Firsoff, V. (1969). The world of mars. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Firsoff, V.A. The World of Mars. Edinburgh: Oliver and Boyd, 1969.

MLA (9th ed.) Citation

Firsoff, V.A. The World of Mars. Oliver and Boyd, 1969.

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