Origin of ptygmatic features

MLA

Ph. H. Kuenen. “Origin of Ptygmatic Features.” Tectonophysics, vol. 6, Aug. 1968, pp. 143–58. EBSCOhost, https://doi.org/10.1016/0040-1951(68)90016-4.

APA

Ph. H. Kuenen. (1968). Origin of ptygmatic features. Tectonophysics, 6, 143–158. https://doi.org/10.1016/0040-1951(68)90016-4

Chicago

Ph. H. Kuenen. 1968. “Origin of Ptygmatic Features.” Tectonophysics 6 (August): 143–58. doi:10.1016/0040-1951(68)90016-4.