APA (7. basım) Alıntı

Gregor, H. F. (1970). Geography of agriculture: Themes in research. Prentice-Hall.

Chicago Style (17. basım) Atıf

Gregor, Howard F. Geography of Agriculture: Themes in Research. Englewood Cliffs, N.J: Prentice-Hall, 1970.

MLA (9th ed.) Atıf

Gregor, Howard F. Geography of Agriculture: Themes in Research. Prentice-Hall, 1970.