Cita APA (7a ed.)

Mugglestone, P., & O'Neill, R. (1990). Fourth dimension: Study book.

Cita Chicago Style (17a ed.)

Mugglestone, Patricia, y Robert O'Neill. Fourth Dimension: Study Book. Harlow, 1990.

Cita MLA (9a ed.)

Mugglestone, Patricia, y Robert O'Neill. Fourth Dimension: Study Book. 1990.