Fischer, E., Frey, W., & Theisen, I. Pinopsida (Gymnosperms), Magnoliopsida (Angiosperms) p.p.: Subclass Magnoliidae [Amborellanae to Magnolianae, Lilianae p.p. (Acorales to Asparagales)].
Chicago Style CitationFischer, Eberhard, Wolfgang Frey, and Inge Theisen. Pinopsida (Gymnosperms), Magnoliopsida (Angiosperms) P.p.: Subclass Magnoliidae [Amborellanae to Magnolianae, Lilianae P.p. (Acorales to Asparagales)].
MLA CitationFischer, Eberhard, Wolfgang Frey, and Inge Theisen. Pinopsida (Gymnosperms), Magnoliopsida (Angiosperms) P.p.: Subclass Magnoliidae [Amborellanae to Magnolianae, Lilianae P.p. (Acorales to Asparagales)].
Warning: These citations may not always be 100% accurate.