Sheldon, D. S., & Penick, J. E. (1991). Favorite labs from outstanding teachers, vol.1. National Association of Biology Teachers.
Цитирование в стиле Чикаго (17-е изд.)Sheldon, Daniel S., и John E. Penick. Favorite Labs from Outstanding Teachers, Vol.1. Reston, VA: National Association of Biology Teachers, 1991.
Цитирование MLA (9-е изд.)Sheldon, Daniel S., и John E. Penick. Favorite Labs from Outstanding Teachers, Vol.1. National Association of Biology Teachers, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.