APA (7th ed.) Citation

Saitz, R. L., & Stieglitz, F. B. (1978). Challenge: A first reader/workbook in English. Winthrop Publishers.

Chicago Style (17th ed.) Citation

Saitz, Robert L., and Francine B. Stieglitz. Challenge: A First Reader/workbook in English. Cambridge, Mass.: Winthrop Publishers, 1978.

MLA (8th ed.) Citation

Saitz, Robert L., and Francine B. Stieglitz. Challenge: A First Reader/workbook in English. Winthrop Publishers, 1978.