APA-ийн эшлэл(7 дахь хэвлэлт)

Chipperfield, R. O. (192). Ethel opens the door: An exploit of the Shadowers. Hurst and Blackett.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Chipperfield, Robert Orr. Ethel Opens the Door: An Exploit of the Shadowers. London: Hurst and Blackett, 192.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Chipperfield, Robert Orr. Ethel Opens the Door: An Exploit of the Shadowers. Hurst and Blackett, 192.