Citazione Stile APA (7a Edizione)

Merkel, K., & Merkel, K. (2005). Trilogy of stone and time: Klaus Merkel. Lars Müller Publishers.

Citazione stile Chigago Style (17a edizione)

Merkel, Klaus, e Klaus Merkel. Trilogy of Stone and Time: Klaus Merkel. [Zürich], Switzerland: Lars Müller Publishers, 2005.

Citatione MLA (8a ed.)

Merkel, Klaus, e Klaus Merkel. Trilogy of Stone and Time: Klaus Merkel. Lars Müller Publishers, 2005.