Citação norma APA

Public Relations Society of the Philippines. Business directory. 1st- 1969. Philippine Editors and Publishers.

Citação norma Chicago

Public Relations Society of the Philippines. Business Directory. 1st- 1969. Manila: Philippine Editors and Publishers.

Citação norma MLA

Public Relations Society of the Philippines. Business Directory. 1st- 1969. Philippine Editors and Publishers.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.