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.