Sporne, K. R. (1975). The Morphology of Pteridophytes: The Structure of Ferns and Allied Plants (4th ed.). Hutchinson.
Chicago-čujuhus (17. p.)Sporne, K. R. The Morphology of Pteridophytes: The Structure of Ferns and Allied Plants. 4th ed. London: Hutchinson, 1975.
MLA-čujuhus (9. p.)Sporne, K. R. The Morphology of Pteridophytes: The Structure of Ferns and Allied Plants. 4th ed. Hutchinson, 1975.
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