APA (7th ed.) Citation

Blackwood P., S. M. (1956). The World and its wonders: In six Vol. McGraw-Hill.

Chicago Style (17th ed.) Citation

Blackwood P., Stephens M.M. The World and Its Wonders: In Six Vol. Chicago: McGraw-Hill, 1956.

MLA (8th ed.) Citation

Blackwood P., Stephens M.M. The World and Its Wonders: In Six Vol. McGraw-Hill, 1956.