APA (7e ed.) Bronvermelding

Hasson, G. (2017). Positive thinking: Find happiness and achieve your goals through the power of positive thought. Capstone, A Wiley Brand.

Chicago (17e ed.) Bronvermelding

Hasson, Gill. Positive Thinking: Find Happiness and Achieve Your Goals Through the Power of Positive Thought. Chichester, West Sussex, UK: Capstone, A Wiley Brand, 2017.

MLA (9e ed.) Bronvermelding

Hasson, Gill. Positive Thinking: Find Happiness and Achieve Your Goals Through the Power of Positive Thought. Capstone, A Wiley Brand, 2017.