Schuller, R. (1985). The be happy attitudes: Eight postive attitudes that can transform your life. Word books.
芝加哥风格引文Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Texas: Word books, 1985.
MLA引文Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Word books, 1985.
警告：这些引文格式不一定是100％准确.