Gaya APA

Smedes, L, B., Tugiyarso, Y. (1990). Teknik mengambil keputusan ( Choices, making right decissions in a complex world ) . Yogyakarta: Kanisius.

Gaya MLA

Smedes, Lewis, B., Tugiyarso, Y.B. "Teknik mengambil keputusan ( Choices, making right decissions in a complex world )". Yogyakarta: Kanisius, 1990. Text.