APA (7th ed.) Citation

Kellerman, A. (1981). Centrographic measures in geography. Geo Abstracts.

Chicago Style (17th ed.) Citation

Kellerman, Aharon. Centrographic Measures in Geography. Norwich: Geo Abstracts, 1981.

MLA (9th ed.) Citation

Kellerman, Aharon. Centrographic Measures in Geography. Geo Abstracts, 1981.

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