Citazione Stile APA (7a Edizione)

Baring-Gould, S. (1911). Cliff castles and cave dwellings of Europe (1a. ed.). Seeley and Co.

Citazione stile Chigago Style (17a edizione)

Baring-Gould, Sabine. Cliff Castles and Cave Dwellings of Europe. 1a. ed. Londres: Seeley and Co, 1911.

Citatione MLA (9a ed.)

Baring-Gould, Sabine. Cliff Castles and Cave Dwellings of Europe. 1a. ed. Seeley and Co, 1911.