Gaya APA
Ketjil, S. (1984).
Grolier Concise Encyclopedia Of Science And Technology Vol. V Q-S .
Danbury:
Grolier International.
Gaya MLA
Ketjil, Soepri.
"Grolier Concise Encyclopedia Of Science And Technology Vol. V Q-S".
Danbury:
Grolier International,
1984.
Text.