APA-referens (7:e uppl.)

FUNK WILFRED. (2022). 30 DAYS TO A MORE POWERFUL VOCABULARY (2022.). POCKET BOOKS.

Chicago-referens (17:e uppl.)

FUNK WILFRED. 30 DAYS TO A MORE POWERFUL VOCABULARY. 2022. NEWYORK: POCKET BOOKS, 2022.

MLA-referens (9:e uppl.)

FUNK WILFRED. 30 DAYS TO A MORE POWERFUL VOCABULARY. 2022. POCKET BOOKS, 2022.