APA

Maclean Alistair,, . (1961). Fear is the key. London: Fonatana.

Chicago

Maclean Alistair,, . 1961. Fear is the key. London: Fonatana.

Harvard

Maclean Alistair,, . (1961). Fear is the key. London: Fonatana.

MLA

Maclean Alistair,, . Fear is the key. London: Fonatana. 1961.