APA (7e ed.) Bronvermelding

Johansson, J., & Escoms, N. Insomnia (1a.ed.). V.

Chicago (17e ed.) Bronvermelding

Johansson, J.R., en Nora Escoms. Insomnia. 1a.ed. Buenos Aires: V.

MLA (9e ed.) Bronvermelding

Johansson, J.R., en Nora Escoms. Insomnia. 1a.ed. V.