Gaya APA

Berpikir Ke Depan = Thinking In The Future Tense = Leadership Skills (menyongsong milenium baru). (1970). Jakarta: PT Gramedia Pustaka Utama.

Gaya MLA

Berpikir Ke Depan = Thinking In The Future Tense = Leadership Skills (menyongsong milenium baru). -. Jakarta: PT Gramedia Pustaka Utama, 1970. Text.