Παραπομπή APA

Johnson, V. W. B. (1954). Land problems and policies.

Παραπομπή Chicago Style

Johnson, V Webster; Barlowe. Land Problems and Policies. McGraw-Hill book Co, Inc, NewYork, 1954.

Παραπομπή MLA

Johnson, V Webster; Barlowe. Land Problems and Policies. 1954.