Citazione Stile APA (7a Edizione)

Liebaers, H. (1980). Mostly in the line of duty: Thirty years with books. Martinus Nijhoff Publishers.

Citazione stile Chigago Style (17a edizione)

Liebaers, Herman. Mostly in the Line of Duty: Thirty Years with Books. The Hague [etc.]: Martinus Nijhoff Publishers, 1980.

Citatione MLA (9a ed.)

Liebaers, Herman. Mostly in the Line of Duty: Thirty Years with Books. Martinus Nijhoff Publishers, 1980.