Lipka (1990), p. 98. Lipka, Leonhard (1990). An outline of English lexicology : lexical structure, word semantics, and word-formation. Forschung & Studium Anglistik (2nd ed.). Tübingen: Niemeyer. ISBN3-484-41003-5. ISSN0178-7861.
Lipka (1990), p. 108. Lipka, Leonhard (1990). An outline of English lexicology : lexical structure, word semantics, and word-formation. Forschung & Studium Anglistik (2nd ed.). Tübingen: Niemeyer. ISBN3-484-41003-5. ISSN0178-7861.