APA Style
Hester, Jeff [et al.]. (2007).
21 st Century Astronomy (2).
New York:
New York: McGraw-Hill,.
Chicago Style
Hester, Jeff [et al.].
21 st Century Astronomy.
2
New York:
New York: McGraw-Hill,,
2007.
Universitas.
MLA Style
Hester, Jeff [et al.].
21 st Century Astronomy.
2
New York:
New York: McGraw-Hill,,
2007.
Universitas.
Turabian Style
Hester, Jeff [et al.].
21 st Century Astronomy.
2
New York:
New York: McGraw-Hill,,
2007.
Universitas.