PIA, Frank. Drowning: New Perspectives on Intervention and Prevention. Redakce Fletemeyer John R.. [s.l.]: [s.n.], 1999. Dostupné online. ISBN978-1-57444-223-6. Kapitola Chapter 14: Reflections on Lifeguard surveillance programs, s. 234.Je zde použita šablona {{Cite book}} označená jako k „pouze dočasnému použití“.
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Hawkins, SC; Sempsrott, J.; Schmidt, A. "Drowning in a Sea of Misinformation: Dry Drowning and Secondary Drowning". Emergency Medicine News. Archived from the original on 7 August 2017. online