APA (7th ed.) Citation

Ludlum, R. (1978). The Holcroft covenant. Hart-Davis MacGibbon.

Chicago Style (17th ed.) Citation

Ludlum, Robert. The Holcroft Covenant. London [etc.]: Hart-Davis MacGibbon, 1978.

MLA (8th ed.) Citation

Ludlum, Robert. The Holcroft Covenant. Hart-Davis MacGibbon, 1978.

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