Cita APA (7th ed.)
Icke, V. (2014). Gravity does not exist: A puzzle for the 21st century. Amsterdam University Press.
Cita Chicago (17th ed.)
Icke, Vincent. Gravity Does Not Exist: A Puzzle for the 21st Century. Amsterdam, Netherlands: Amsterdam University Press, 2014.
Cita MLA (9th ed.)
Icke, Vincent. Gravity Does Not Exist: A Puzzle for the 21st Century. Amsterdam University Press, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.