Graham, b. (1998). The Secret of Happiness= Rahasia Kebahagiaan/ Billy Graham; Penerjemah, Wim Salampessy. Batam: interaksa.
Chicagoスタイル(17版)引用形式Graham, billy. The Secret of Happiness= Rahasia Kebahagiaan/ Billy Graham; Penerjemah, Wim Salampessy. Batam: interaksa, 1998.
MLA(8版)引用形式Graham, billy. The Secret of Happiness= Rahasia Kebahagiaan/ Billy Graham; Penerjemah, Wim Salampessy. Batam: interaksa, 1998.
警告: この引用は必ずしも正確ではありません.