APA Style

Dapat, R, O. (2018). Essence and essentials of purposive communication in the 21st century . Mandaluyong City: Books ATBP. Publishing Corp..

MLA Style

Dapat, Rizal, O.. "Essence and essentials of purposive communication in the 21st century". Mandaluyong City: Books ATBP. Publishing Corp., 2018. Text.