APA (7th ed.) Citation

Roberts, K. L., & Roberts, K. (1970). Leisure. Longman.

Chicago Style (17th ed.) Citation

Roberts, Kenneth L., and Kenneth Roberts. Leisure. London: Longman, 1970.

MLA (9th ed.) Citation

Roberts, Kenneth L., and Kenneth Roberts. Leisure. Longman, 1970.

Warning: These citations may not always be 100% accurate.