APA (7th ed.) Citation

Tremayne, P. (1998). Valley of the shadow: A Sister Fidelma mystery (1. publ. in paperback.). Headline.

Chicago Style (17th ed.) Citation

Tremayne, Peter. Valley of the Shadow: A Sister Fidelma Mystery. 1. publ. in paperback. London: Headline, 1998.

MLA (8th ed.) Citation

Tremayne, Peter. Valley of the Shadow: A Sister Fidelma Mystery. 1. publ. in paperback. Headline, 1998.