WRR. (1974). Europese Unie. WRR.
Tohutoru Kātū Chicago (17th ed.)WRR. Europese Unie. WRR, 1974.
Tohutoro MLA (9th ed.)WRR. Europese Unie. WRR, 1974.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.
Tohutoro APA (7th ed.)