APA Style

Henry, O., Merlan, N. (2021). SASMO (Singapore and Asian Schools Math Olympiad) Primary 2 [Grade 2] Math Competitions 2014 to 2018 contest problems with full solutions (1st edtion). Singapore: Singapore International Mastery Contests Centre (SIMCC).

MLA Style

Henry, Ong., Merlan, Nagiduilin. "SASMO (Singapore and Asian Schools Math Olympiad) Primary 2 [Grade 2] Math Competitions 2014 to 2018 contest problems with full solutions". 1st edtion Singapore: Singapore International Mastery Contests Centre (SIMCC), 2021. Reference.