APA (7th ed.) Citation

Wong, R. (1990). Ruth Wong's unto each child the best. PG Publishing Pte.

Chicago Style (17th ed.) Citation

Wong, Ruth. Ruth Wong's Unto Each Child the Best. Singapore: PG Publishing Pte, 1990.

MLA (9th ed.) Citation

Wong, Ruth. Ruth Wong's Unto Each Child the Best. PG Publishing Pte, 1990.

Warning: These citations may not always be 100% accurate.