Gaya APA
Seeds, Michael A., Backman, Dana E.. (2016).
Stars and galaxies (9th ed.).
Massachusetts:
Cengage Learing.
Gaya Chicago
Seeds, Michael A., Backman, Dana E..
Stars and galaxies.
9th ed.
Massachusetts:
Cengage Learing,
2016.
Text.
Gaya MLA
Seeds, Michael A., Backman, Dana E..
Stars and galaxies.
9th ed.
Massachusetts:
Cengage Learing,
2016.
Text.
Gaya Turabian
Seeds, Michael A., Backman, Dana E..
Stars and galaxies.
9th ed.
Massachusetts:
Cengage Learing,
2016.
Print.