Schuller, R. (1985). The be happy attitudes: Eight postive attitudes that can transform your life. Word books.
Chicagoスタイル(17版)引用形式Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Texas: Word books, 1985.
MLA(9版)引用形式Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Word books, 1985.
警告: この引用は必ずしも正確ではありません.