APA (7th ed.) Citation

Walker, M. F., & Walker, M. F. (1972). Electronographic photometry of star clusters in the Magellanic clouds. [Selbstverl.].

Chicago Style (17th ed.) Citation

Walker, Merle F., and Merle F. Walker. Electronographic Photometry of Star Clusters in the Magellanic Clouds. Mount Hamilton, Calif: [Selbstverl.], 1972.

MLA (9th ed.) Citation

Walker, Merle F., and Merle F. Walker. Electronographic Photometry of Star Clusters in the Magellanic Clouds. [Selbstverl.], 1972.