Gaya APA

Allen, G, E., Baker, J, J, W. (1981). Matter, energy and life : an introduction to chemical concepts (4th.ed.). California: Cumming Publishing.

Gaya MLA

Allen, Garland, E.., Baker, Jeffry, J., W.. "Matter, energy and life : an introduction to chemical concepts". 4th.ed. California: Cumming Publishing, 1981. Text.