Swanepoel, J. H. (1970). The ontogenesis of the chondrocranium and of the nasal sac of the microhylid frog Breviceps adspersus pentheri Werner. Stellenbosch University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSwanepoel, J. H. The Ontogenesis of the Chondrocranium and of the Nasal Sac of the Microhylid Frog Breviceps Adspersus Pentheri Werner. Stellenbosch: Stellenbosch University, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSwanepoel, J. H. The Ontogenesis of the Chondrocranium and of the Nasal Sac of the Microhylid Frog Breviceps Adspersus Pentheri Werner. Stellenbosch University, 1970.
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