APA (7th ed.) Citation

(1965). Wolff, Joop. . Groot, Paul de.

Chicago Style (17th ed.) Citation

Wolff, Joop. . Groot, Paul De. 1965.

MLA (8th ed.) Citation

Wolff, Joop. . Groot, Paul De. 1965.

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