APA (7e ed.) Bronvermelding

Gray, J. (2013). Venus on fire mars on ice: The Key to Love, Life and Energy. Pralibris Publishing Media.

Chicago (17e ed.) Bronvermelding

Gray, John. Venus on Fire Mars on Ice: The Key to Love, Life and Energy. Conquitlam: Pralibris Publishing Media, 2013.

MLA (9e ed.) Bronvermelding

Gray, John. Venus on Fire Mars on Ice: The Key to Love, Life and Energy. Pralibris Publishing Media, 2013.