Gaya APA

Bird, R. (2017). The Dyscalculia Resource Book Games and Puzzles for ages 7 to 14 : 2nd Edition . Inggris: SAGE.

Gaya MLA

Bird, Ronit. "The Dyscalculia Resource Book Games and Puzzles for ages 7 to 14 : 2nd Edition". Inggris: SAGE, 2017. Text.