Citazione Stile APA (7a Edizione)

Thiess, U. (2007). "... but I have promises to keep.": My life before, with and after Robert Taylor. Xlibris.

Citazione stile Chigago Style (17a edizione)

Thiess, Ursula. "... but I Have Promises to Keep.": My Life Before, with and After Robert Taylor. [Philadelphia]: Xlibris, 2007.

Citatione MLA (9a ed.)

Thiess, Ursula. "... but I Have Promises to Keep.": My Life Before, with and After Robert Taylor. Xlibris, 2007.