Lang, J. (1990). Seni menjual kreatif. Binarupa Aksara.
Chicago Style (17th ed.) CitationLang, JW. Seni Menjual Kreatif. Binarupa Aksara, 1990.
MLA (8th ed.) CitationLang, JW. Seni Menjual Kreatif. Binarupa Aksara, 1990.
Warning: These citations may not always be 100% accurate.