Gaya APA

Ramirez, A, S., Llevero, E, D, V. (1996). Elementary mathematics, grade 4 (Cet.1). Manila: Philippine Christian University.

Gaya MLA

Ramirez, Aida, Santos., Llevero, Emma, De, Vianna. "Elementary mathematics, grade 4". Cet.1 Manila: Philippine Christian University, 1996. Text.