APA Style

Henry, O., Merlan, N. (2023). SASMO (Singapore and Asian Schools Math Olympiad) Primary 5 2021 & 2022 (1st edition). Singapore: Singapore International Mastery Contests Centre (SIMCC).

MLA Style

Henry, Ong., Merlan, Nagidulin. "SASMO (Singapore and Asian Schools Math Olympiad) Primary 5 2021 & 2022". 1st edition Singapore: Singapore International Mastery Contests Centre (SIMCC), 2023. Reference.