APA (7. basım) Alıntı

Johnston, R. J. (1976). Classification in geography. Geo Abstracts Ltd.

Chicago Style (17. basım) Atıf

Johnston, R. J. Classification in Geography. Norwich: Geo Abstracts Ltd, 1976.

MLA (8th ed.) Atıf

Johnston, R. J. Classification in Geography. Geo Abstracts Ltd, 1976.