APA (7th ed.) Citation

Gunning, C., & Van Loon, H. (1923). De geschiedenis der mensheid. [S.l.]: [s.n.].

Chicago Style (17th ed.) Citation

Gunning, C.P, and Hendrik Van Loon. De Geschiedenis Der Mensheid. [S.l.]: [s.n.], 1923.

MLA (8th ed.) Citation

Gunning, C.P, and Hendrik Van Loon. De Geschiedenis Der Mensheid. [S.l.]: [s.n.], 1923.

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