Seaton, R. S. (1976). Here's how: Health education by extension. William Carrey Library.
Chicago-viite (17. p.)Seaton, Ronald S. Here's How: Health Education by Extension. California: William Carrey Library, 1976.
MLA-viite (9. p.)Seaton, Ronald S. Here's How: Health Education by Extension. William Carrey Library, 1976.
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