Karstein, H. (1986). Positive thinking for positive living. Author.
Chicagoスタイル(17版)引用形式Karstein, H. Positive Thinking for Positive Living. Bombay: Author, 1986.
MLA(9版)引用形式Karstein, H. Positive Thinking for Positive Living. Author, 1986.
警告: この引用は必ずしも正確ではありません.