Curtis, D. (1960). Learn while you sleep: Theory and practice of sleep learning. Libra Publishers.
Chicago Edition CitationCurtis, David. Learn While You Sleep: Theory and Practice of Sleep Learning. New York: Libra Publishers, 1960.
MLA Edition CitationCurtis, David. Learn While You Sleep: Theory and Practice of Sleep Learning. Libra Publishers, 1960.
Warning: These citations may not always be 100% accurate.