Philippines. Department of Labor. (1972). The Department of Labor: 1966 to 1972. s.n.].
Chicago (17e ed.) BronvermeldingPhilippines. Department of Labor. The Department of Labor: 1966 to 1972. [s.l: s.n.], 1972.
MLA (9e ed.) BronvermeldingPhilippines. Department of Labor. The Department of Labor: 1966 to 1972. s.n.], 1972.
Let op: Deze citaties zijn niet altijd 100% accuraat.