APA (7th ed.) Citation

Landsberg, H. E. (1958). Physical climatology (2d ed.). Gray Print. Co..

Chicago Style (17th ed.) Citation

Landsberg, Helmut Erich. Physical Climatology. 2d ed. DuBois, Pa.: Gray Print. Co., 1958.

MLA (9th ed.) Citation

Landsberg, Helmut Erich. Physical Climatology. 2d ed. Gray Print. Co., 1958.