APA (7th ed.) Citation

MacLean, A. (1971). Fear is the key (1st issued, 16th imp.). Collins.

Chicago Style (17th ed.) Citation

MacLean, Alistair. Fear Is the Key. 1st issued, 16th imp. London [etc.]: Collins, 1971.

MLA (9th ed.) Citation

MacLean, Alistair. Fear Is the Key. 1st issued, 16th imp. Collins, 1971.

Warning: These citations may not always be 100% accurate.