APA (7th ed.) Citation

Hansen, B., & Rahn, K. (1969). Determination of angiosperm families by means of a punched-card system. Verf.

Chicago Style (17th ed.) Citation

Hansen, Bertel, and Knud Rahn. Determination of Angiosperm Families by Means of a Punched-card System. København: Verf, 1969.

MLA (9th ed.) Citation

Hansen, Bertel, and Knud Rahn. Determination of Angiosperm Families by Means of a Punched-card System. Verf, 1969.

Warning: These citations may not always be 100% accurate.