APA

Lamb R G, . (1980). Iron Age promontory forts in the northern isles. Oxford: B.A.R.

Chicago

Lamb R G, . 1980. Iron Age promontory forts in the northern isles. Oxford: B.A.R.

Harvard

Lamb R G, . (1980). Iron Age promontory forts in the northern isles. Oxford: B.A.R.

MLA

Lamb R G, . Iron Age promontory forts in the northern isles. Oxford: B.A.R. 1980.