APA
Portillo R. R., Imelda K. Gamboa, Vivian B. Flores, Ma. Consuelo S. Quindara, Mila E. Isles, Amelia O. Bacungan, Clarita O. Manzano & Carolina G. Alberca. (2003). Research and Technical Writing. Meycauayan, Bulacan, Philippines: Trinitas Publishing, Inc.
Chicago
Portillo Reynaldo R, Imelda K. Gamboa, Vivian B. Flores, Ma. Consuelo S. Quindara, Mila E. Isles, Amelia O. Bacungan, Clarita O. Manzano and Carolina G. Alberca. 2003. Research and Technical Writing. Meycauayan, Bulacan, Philippines: Trinitas Publishing, Inc.
Harvard
Portillo R. R., Imelda K. Gamboa, Vivian B. Flores, Ma. Consuelo S. Quindara, Mila E. Isles, Amelia O. Bacungan, Clarita O. Manzano and Carolina G. Alberca. (2003). Research and Technical Writing. Meycauayan, Bulacan, Philippines: Trinitas Publishing, Inc.
MLA
Portillo Reynaldo R, Imelda K. Gamboa, Vivian B. Flores, Ma. Consuelo S. Quindara, Mila E. Isles, Amelia O. Bacungan, Clarita O. Manzano and Carolina G. Alberca. Research and Technical Writing. Meycauayan, Bulacan, Philippines: Trinitas Publishing, Inc. 2003.
