Pulgram, E. (1979). The voiceless bilabial spirant in Indo-European. Amsterdam studies in the theory and history of linguistic science, Amsterdam, 11 ; P.691-704, 1.
Chicago Style (17th ed.) CitationPulgram, E. "The Voiceless Bilabial Spirant in Indo-European." Amsterdam Studies in the Theory and History of Linguistic Science, Amsterdam, 11 ; P.691-704 1979: 1.
MLA (9th ed.) CitationPulgram, E. "The Voiceless Bilabial Spirant in Indo-European." Amsterdam Studies in the Theory and History of Linguistic Science, Amsterdam, 11 ; P.691-704, 1979, p. 1.
Warning: These citations may not always be 100% accurate.