Cita APA

Lydolph, P. E., & Lydolph, P. E. (1970). Geography of the U.S.S.R (2. edition.). New York, New York: Willey.

Citación estilo Chicago

Lydolph, Paul E., y Paul E. Lydolph. Geography of the U.S.S.R. 2. edition. New York, New York: Willey, 1970.

Cita MLA

Lydolph, Paul E., y Paul E. Lydolph. Geography of the U.S.S.R. 2. edition. New York, New York: Willey, 1970.