Gaya APA

Shepherd, Peter, Laila Qadria. (2021). The positive approach: manfaat berpikir dan bersikap positif . Yogyakarta: Bright Publisher.

Gaya Chicago

Shepherd, Peter, Laila Qadria. The positive approach: manfaat berpikir dan bersikap positif. Yogyakarta: Bright Publisher, 2021. Text.

Gaya MLA

Shepherd, Peter, Laila Qadria. The positive approach: manfaat berpikir dan bersikap positif. Yogyakarta: Bright Publisher, 2021. Text.

Gaya Turabian

Shepherd, Peter, Laila Qadria. The positive approach: manfaat berpikir dan bersikap positif. Yogyakarta: Bright Publisher, 2021. Print.