APA
Erdtman G., Praglowski J. & Nilsson S. (1963). An introduction to a scandinavian pollen flora. Stockholm: Almqvist & Wiksell.
Chicago
Erdtman G, Praglowski J and Nilsson S. 1963. An introduction to a scandinavian pollen flora. Stockholm: Almqvist & Wiksell.
Harvard
Erdtman G., Praglowski J. and Nilsson S. (1963). An introduction to a scandinavian pollen flora. Stockholm: Almqvist & Wiksell.
MLA
Erdtman G, Praglowski J and Nilsson S. An introduction to a scandinavian pollen flora. Stockholm: Almqvist & Wiksell. 1963.