APA
Letterman G Gregory,, . (2001). UNIDROIT's Rules in Practice : Standard International Contracts and Applicable Rules. The Hague: Kluwer Law International.
Chicago
Letterman G Gregory,, . 2001. UNIDROIT's Rules in Practice : Standard International Contracts and Applicable Rules. The Hague: Kluwer Law International.
Harvard
Letterman G Gregory,, . (2001). UNIDROIT's Rules in Practice : Standard International Contracts and Applicable Rules. The Hague: Kluwer Law International.
MLA
Letterman G Gregory,, . UNIDROIT's Rules in Practice : Standard International Contracts and Applicable Rules. The Hague: Kluwer Law International. 2001.