Peale, N. V. (1996). Tetaplah bersemangat sepanjang hidup anda. Binarupa Aksara.
Chicago Style (17th ed.) CitationPeale, Norman Vincent. Tetaplah Bersemangat Sepanjang Hidup Anda. Binarupa Aksara, 1996.
MLA (8th ed.) CitationPeale, Norman Vincent. Tetaplah Bersemangat Sepanjang Hidup Anda. Binarupa Aksara, 1996.
Warning: These citations may not always be 100% accurate.