Analysis of information sources in references of the Wikipedia article "Approximant" in English language version.
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: CS1 maint: DOI inactive as of November 2024 (link) Ladefoged, Peter; Maddieson, Ian (1996), The Sounds of the World's Languages, Oxford: Blackwell, ISBN 0-631-19815-6{{citation}}
: CS1 maint: DOI inactive as of November 2024 (link){{citation}}
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: CS1 maint: DOI inactive as of November 2024 (link) Ladefoged, Peter (1964), A Phonetic Study of West African Languages, Cambridge: Cambridge University Press{{citation}}
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: CS1 maint: DOI inactive as of November 2024 (link){{cite conference}}
: CS1 maint: overridden setting (link){{cite conference}}
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: CS1 maint: DOI inactive as of November 2024 (link) Ladefoged, Peter; Maddieson, Ian (1996), The Sounds of the World's Languages, Oxford: Blackwell, ISBN 0-631-19815-6{{citation}}
: CS1 maint: DOI inactive as of November 2024 (link){{citation}}
: CS1 maint: DOI inactive as of November 2024 (link){{citation}}
: CS1 maint: DOI inactive as of November 2024 (link) Ladefoged, Peter (1964), A Phonetic Study of West African Languages, Cambridge: Cambridge University Press{{citation}}
: CS1 maint: DOI inactive as of November 2024 (link){{citation}}
: CS1 maint: DOI inactive as of November 2024 (link)