Swan, S. H., & Colino, S. (2021). Count down: How our modern world is threatening sperm counts, altering male and female reproductive development, and imperiling the future of the human race (First Scribner hardcover edition.). Scribner.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSwan, Shanna H., और Stacey Colino. Count Down: How Our Modern World Is Threatening Sperm Counts, Altering Male and Female Reproductive Development, and Imperiling the Future of the Human Race. First Scribner hardcover edition. New York: Scribner, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSwan, Shanna H., और Stacey Colino. Count Down: How Our Modern World Is Threatening Sperm Counts, Altering Male and Female Reproductive Development, and Imperiling the Future of the Human Race. First Scribner hardcover edition. Scribner, 2021.