Gaya APA

Dale, Arbie M. (1977). 20 minutes a day to a more powerful intelligence . united states of america: playboy press.

Gaya Chicago

Dale, Arbie M. 20 minutes a day to a more powerful intelligence. united states of america: playboy press, 1977. Buku Teks.

Gaya MLA

Dale, Arbie M. 20 minutes a day to a more powerful intelligence. united states of america: playboy press, 1977. Buku Teks.

Gaya Turabian

Dale, Arbie M. 20 minutes a day to a more powerful intelligence. united states of america: playboy press, 1977. Buku Teks.