APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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