APA (7th ed.) Citation

Parker, R. B. (1991). The widening gyre. Severn House Publishers.

Chicago Style (17th ed.) Citation

Parker, Robert B. The Widening Gyre. Surrey: Severn House Publishers, 1991.

MLA (9th ed.) Citation

Parker, Robert B. The Widening Gyre. Severn House Publishers, 1991.

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