Gaya APA

Arifin,Antoni Ludfi. (2012). Demi Waktu : So Use Your Time Effectively . Jakarta: PT.Gramedia Pustaka Utama.

Gaya Chicago

Arifin,Antoni Ludfi. Demi Waktu : So Use Your Time Effectively. Jakarta: PT.Gramedia Pustaka Utama, 2012. Text.

Gaya MLA

Arifin,Antoni Ludfi. Demi Waktu : So Use Your Time Effectively. Jakarta: PT.Gramedia Pustaka Utama, 2012. Text.

Gaya Turabian

Arifin,Antoni Ludfi. Demi Waktu : So Use Your Time Effectively. Jakarta: PT.Gramedia Pustaka Utama, 2012. Print.