APA Style

ONG, H., Nagidulin, M. (2019). SASMO (Singapore and Asian Schools Math Olympiad) Secondary 3 [Grade 9] Math Competitions 2014 to 2018 contest problems with full solutions (5 Years Series) . Singapore: Noble Education Pte Ltd.

MLA Style

ONG, Henry., Nagidulin, Merlan. "SASMO (Singapore and Asian Schools Math Olympiad) Secondary 3 [Grade 9] Math Competitions 2014 to 2018 contest problems with full solutions (5 Years Series)". Singapore: Noble Education Pte Ltd, 2019. Text.