(1986). EPA project officers' handbook.
Tohutoru Kātū Chicago (17th ed.)EPA Project Officers' Handbook. 1986.
Tohutoro MLA (9th ed.)EPA Project Officers' Handbook. 1986.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.
Tohutoro APA (7th ed.)