Sumardi, Y. (1985). Pengantar pengetahuan antariksa. FPMIPA IKIP.
Chicago Style (17th ed.) CitationSumardi, Yosaphat. Pengantar Pengetahuan Antariksa. FPMIPA IKIP, 1985.
MLA (8th ed.) CitationSumardi, Yosaphat. Pengantar Pengetahuan Antariksa. FPMIPA IKIP, 1985.
Warning: These citations may not always be 100% accurate.