APA (7th ed.) Citation

MacCrimmon, I. (1989). What is light? The nature of the fifth dimension, 439-444.

Chicago Style (17th ed.) Citation

MacCrimmon, Ian. "What Is Light?" The Nature of the Fifth Dimension 1989: 439-444.

MLA (9th ed.) Citation

MacCrimmon, Ian. "What Is Light?" The Nature of the Fifth Dimension, 1989, pp. 439-444.

Warning: These citations may not always be 100% accurate.