APA Citation

(2016). The Secret of focus (Cet 1.). Yogyakarta: Psikologi Corner.

Chicago Style Citation

The Secret of Focus. Cet 1. Yogyakarta: Psikologi Corner, 2016.

MLA Citation

The Secret of Focus. Cet 1. Yogyakarta: Psikologi Corner, 2016.

Warning: These citations may not always be 100% accurate.