APA-referens (7:e uppl.)

Philippine National Railways. Report for the fiscal year ended June 30, 19-. s.n.

Chicago-referens (17:e uppl.)

Philippine National Railways. Report for the Fiscal Year Ended June 30, 19-. [Manila: s.n.

MLA-referens (9:e uppl.)

Philippine National Railways. Report for the Fiscal Year Ended June 30, 19-. s.n.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.