APA (7e ed.) Bronvermelding

Tondorf, F. A. (1920). Anniversary tribute to George Martin Kober: In celebration of his seventieth birthday by his friends and associates, March 28, 1920.

Chicago (17e ed.) Bronvermelding

Tondorf, Francis A. Anniversary Tribute to George Martin Kober: In Celebration of His Seventieth Birthday by His Friends and Associates, March 28, 1920. Washington, D.C, 1920.

MLA (8e ed.) Bronvermelding

Tondorf, Francis A. Anniversary Tribute to George Martin Kober: In Celebration of His Seventieth Birthday by His Friends and Associates, March 28, 1920. 1920.