Primitive time-reckoning

MLA

Nilsson, Martin Persson. Primitive Time-reckoning. Lund: C.W.K. Gleerup, 1920.

APA

Nilsson, M. Persson. (1920). Primitive time-reckoning. Lund: C.W.K. Gleerup.

Chicago

Nilsson, Martin Persson, Primitive Time-Reckoning. Lund: C.W.K. Gleerup, 1920.