APA Style
Forbes, George. (2010).
History of astronomy .
USA:
HardPress.
Chicago Style
Forbes, George.
History of astronomy.
USA:
HardPress,
2010.
Textbook.
MLA Style
Forbes, George.
History of astronomy.
USA:
HardPress,
2010.
Textbook.
Turabian Style
Forbes, George.
History of astronomy.
USA:
HardPress,
2010.
Textbook.