Cita APA (7th ed.)
Houten-Groeneveld, I. v., & Houten, C. J. v. (1958). Photometric studies of asteroids.
Cita Chicago (17th ed.)
Houten-Groeneveld, Ingrid van, i C. J. van Houten. Photometric Studies of Asteroids. 1958.
Cita MLA (9th ed.)
Houten-Groeneveld, Ingrid van, i C. J. van Houten. Photometric Studies of Asteroids. 1958.
Atenció: Aquestes cites poden no estar 100% correctes.