Cita APA (7th ed.)

Lapp, R. E. (1981). Matter (2d ed.). Time-Life Books.

Cita Chicago (17th ed.)

Lapp, Ralph Eugene. Matter. 2d ed. Hongkong: Time-Life Books, 1981.

Cita MLA (9th ed.)

Lapp, Ralph Eugene. Matter. 2d ed. Time-Life Books, 1981.