APA

Bockol L., Sams B., . (2004). Maths Addition. China: Innovative Kids.

Chicago

Bockol Leslie, Sams BB, . 2004. Maths Addition. China: Innovative Kids.

Harvard

Bockol L., Sams B., . (2004). Maths Addition. China: Innovative Kids.

MLA

Bockol Leslie, Sams BB, . Maths Addition. China: Innovative Kids. 2004.