Cita APA (7th ed.)

Trewartha, . G. T., Robinson, A. H., & Hammond, E. H. (1968). Fundamentals of physical geography (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Trewartha, Glenn T., Arthur H. Robinson, i Edwin H. Hammond. Fundamentals of Physical Geography. 2nd ed. New York: McGraw-Hill, 1968.

Cita MLA (9th ed.)

Trewartha, Glenn T., et al. Fundamentals of Physical Geography. 2nd ed. McGraw-Hill, 1968.