APA-ийн эшлэл(7 дахь хэвлэлт)

Pen, R. (2010). I wonder as I wander: The life of John Jacob Niles. University Press of Kentucky.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Pen, Ronald. I Wonder as I Wander: The Life of John Jacob Niles. Lexington, Ky: University Press of Kentucky, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Pen, Ronald. I Wonder as I Wander: The Life of John Jacob Niles. University Press of Kentucky, 2010.