International Astronomical Union. Colloquium, International Astronomical Union, & Fitch, W. S. (1976). Multiple periodic variable stars: Proceedings of the International Astronomical Union Colloquium No. 29, held at Budapest, Hungary, 1-5 September 1975 : Invited papers. Akadémiai Kiadó ; D. Reidel Publ. Co..
Chicago-Zitierstil (17. Ausg.)International Astronomical Union. Colloquium, International Astronomical Union, und Walter S. Fitch. Multiple Periodic Variable Stars: Proceedings of the International Astronomical Union Colloquium No. 29, Held at Budapest, Hungary, 1-5 September 1975 : Invited Papers. Budapest : Boston: Akadémiai Kiadó ; D. Reidel Publ. Co., 1976.
MLA-Zitierstil (8. Ausg.)International Astronomical Union. Colloquium, et al. Multiple Periodic Variable Stars: Proceedings of the International Astronomical Union Colloquium No. 29, Held at Budapest, Hungary, 1-5 September 1975 : Invited Papers. Akadémiai Kiadó ; D. Reidel Publ. Co., 1976.