APA Style
LUBIS, Mochtar, Espig, Gustav, Suherly, Lily, Bittner, Alfred. (1988).
Ekologi .
Jakarta:
Obor.
Chicago Style
LUBIS, Mochtar, Espig, Gustav, Suherly, Lily, Bittner, Alfred.
Ekologi.
Jakarta:
Obor,
1988.
Text.
MLA Style
LUBIS, Mochtar, Espig, Gustav, Suherly, Lily, Bittner, Alfred.
Ekologi.
Jakarta:
Obor,
1988.
Text.
Turabian Style
LUBIS, Mochtar, Espig, Gustav, Suherly, Lily, Bittner, Alfred.
Ekologi.
Jakarta:
Obor,
1988.
Print.