Citazione Stile APA (7a Edizione)

Drummond, I. (1977). The necklace of skulls. Joseph.

Citazione stile Chigago Style (17a edizione)

Drummond, Ivor. The Necklace of Skulls. London: Joseph, 1977.

Citatione MLA (8a ed.)

Drummond, Ivor. The Necklace of Skulls. Joseph, 1977.