Gaya APA
BERNSTEIN, L. et al (2009).
Earth. Science : Concepts and Challenges Teacer's Edition / BERNSTEIN, Leonard ,: SCHACHTER, Martin ,: WINKLER, Alan, Dkk (Ed.4).
America:
Pearson Education.
Gaya MLA
BERNSTEIN, Leonard. et al.
"Earth. Science : Concepts and Challenges Teacer's Edition / BERNSTEIN, Leonard ,: SCHACHTER, Martin ,: WINKLER, Alan, Dkk".
Ed.4
America:
Pearson Education,
2009.
Text.