Mudge, K.W., Hennigan, K., Podaras, P. 2003. Use of Tropical Hibiscus for Instruction in Grafting. HortTechnology. 13(4): 723-728.
Hennigan, Kelly, Mazza, Charles, Cunningham, Sally-Jean. 2001. Organic Gardening. This award winning extension publication is an educational module consisting of 80 slides and a script. The module steps the learner through the fundamental principles of organic gardening. Emphasis is on soil building, using organic matter, pest management practices (biological, cultural, mechanical, and chemical) and gardening in harmony with nature.