APA-referens (7:e uppl.)

KOLEY,RUBY. (2016). CONNECT WITH SCIENCE - BOOK 4. OXFORD UNIVERSITY PRESS.

Chicago-referens (17:e uppl.)

KOLEY,RUBY. CONNECT WITH SCIENCE - BOOK 4. NEW DELHI: OXFORD UNIVERSITY PRESS, 2016.

MLA-referens (9:e uppl.)

KOLEY,RUBY. CONNECT WITH SCIENCE - BOOK 4. OXFORD UNIVERSITY PRESS, 2016.