Cita APA

Davis, N. B., & Davis, N. B. (1973). Vocabulary improvement: A program for self-instruction (2.edition.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Davis, Nancy B., y Nancy B. Davis. Vocabulary Improvement: A Program for Self-instruction. 2.edition. New York, New York: McGraw-Hill, 1973.

Cita MLA

Davis, Nancy B., y Nancy B. Davis. Vocabulary Improvement: A Program for Self-instruction. 2.edition. New York, New York: McGraw-Hill, 1973.