APA (7th ed.) Citation

Koh, K. M., & Tay, E. G. (2013). Counting (2. ed.). World Scientific.

Chicago Style (17th ed.) Citation

Koh, Khee Meng, and Eng Guan Tay. Counting. 2. ed. Singapore [u.a.]: World Scientific, 2013.

MLA (9th ed.) Citation

Koh, Khee Meng, and Eng Guan Tay. Counting. 2. ed. World Scientific, 2013.