APA (7e ed.) Bronvermelding

Ludlum, R. (1991). The Scarlatti inheritance ; The Osterman weekend ; The Matlock paper ; The Gemini contenders. Peerage Books.

Chicago (17e ed.) Bronvermelding

Ludlum, Robert. The Scarlatti Inheritance ; The Osterman Weekend ; The Matlock Paper ; The Gemini Contenders. London: Peerage Books, 1991.

MLA (9e ed.) Bronvermelding

Ludlum, Robert. The Scarlatti Inheritance ; The Osterman Weekend ; The Matlock Paper ; The Gemini Contenders. Peerage Books, 1991.