Cita APA (7a ed.)

Schomburg, C. E. (1982). People and the land ([Bd.] 4.). Economy.

Cita Chicago Style (17a ed.)

Schomburg, Carl E. People and the Land. [Bd.] 4. Oklahoma City [u.a.]: Economy, 1982.

Cita MLA (9a ed.)

Schomburg, Carl E. People and the Land. [Bd.] 4. Economy, 1982.