Poapolathep, Amnart, Malinee Limpoka, Natthasit Tansakul, Napasorn Phaochoosak, Naruamol Klangkaew, and Wanida Passadurak. 2001. “Pharmacokinetics and Withdrawal Times of Ampicillin in Ducks”. Agriculture and Natural Resources 35 (1). Bangkok, Thailand:40-45. https://li01.tci-thaijo.org/index.php/anres/article/view/240318.