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.