APA (7th ed.) Citation

Richardson, D. (1981). Eternity in their hearts. Regal Books.

Chicago Style (17th ed.) Citation

Richardson, Don. Eternity in Their Hearts. Ventura, CA, U.S.A.: Regal Books, 1981.

MLA (9th ed.) Citation

Richardson, Don. Eternity in Their Hearts. Regal Books, 1981.