von Ehrenfried, M. "., & von Ehrenfried, M. ". (2019). From Cave Man to Cave Martian: Living in Caves on the Earth, Moon and Mars (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-05408-3
Παραπομπή σε μορφή Chicago (17η εκδ.)von Ehrenfried, Manfred "Dutch", και Manfred "Dutch" von Ehrenfried. From Cave Man to Cave Martian: Living in Caves on the Earth, Moon and Mars. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-05408-3.
Παραπομπή σε μορφή MLA (8th εκδ.)von Ehrenfried, Manfred "Dutch", και Manfred "Dutch" von Ehrenfried. From Cave Man to Cave Martian: Living in Caves on the Earth, Moon and Mars. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-05408-3.
