Gaya APA

Shepherd, Peter, Zulkarnaen Ishak, Laila Qadria. (2018). The Positive Approach: manfaat berpikir dan bersikap positif (1). Yogyakarta: Bright Publisher.

Gaya Chicago

Shepherd, Peter, Zulkarnaen Ishak, Laila Qadria. The Positive Approach: manfaat berpikir dan bersikap positif. 1 Yogyakarta: Bright Publisher, 2018. Text.

Gaya MLA

Shepherd, Peter, Zulkarnaen Ishak, Laila Qadria. The Positive Approach: manfaat berpikir dan bersikap positif. 1 Yogyakarta: Bright Publisher, 2018. Text.

Gaya Turabian

Shepherd, Peter, Zulkarnaen Ishak, Laila Qadria. The Positive Approach: manfaat berpikir dan bersikap positif. 1 Yogyakarta: Bright Publisher, 2018. Print.