APA (7th ed.) Citation

JOHN DUNCAN. (2019). ASTRONOMY (2016 Ed.). PARRAGON BOOK PUBLISHERS.

Chicago Style (17th ed.) Citation

JOHN DUNCAN. ASTRONOMY. 2016 Ed. LONDON: PARRAGON BOOK PUBLISHERS, 2019.

MLA (9th ed.) Citation

JOHN DUNCAN. ASTRONOMY. 2016 Ed. PARRAGON BOOK PUBLISHERS, 2019.