APA-ийн эшлэл(7 дахь хэвлэлт)

Portass, R. (2017). The village world of early medieval Northern Spain: Local community and the land market. Boydell & Brewer.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Portass, Robert. The Village World of Early Medieval Northern Spain: Local Community and the Land Market. Suffolk: Boydell & Brewer, 2017.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Portass, Robert. The Village World of Early Medieval Northern Spain: Local Community and the Land Market. Boydell & Brewer, 2017.