APA (7th ed.) Citation

Ludlum, R. The Holcroft covenant. [s.n.].

Chicago Style (17th ed.) Citation

Ludlum, Robert. The Holcroft Covenant. [s.l.]: [s.n.].

MLA (9th ed.) Citation

Ludlum, Robert. The Holcroft Covenant. [s.n.].

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