APA (7th ed.) Citation

Wilkinson, A. (1989). Questioning gravity: A new hypothesis. Self Publ. Assoc.

Chicago Style (17th ed.) Citation

Wilkinson, Arthur. Questioning Gravity: A New Hypothesis. Upton-upon-Severn, Worcs: Self Publ. Assoc, 1989.

MLA (9th ed.) Citation

Wilkinson, Arthur. Questioning Gravity: A New Hypothesis. Self Publ. Assoc, 1989.