Caplan, F. (1977). The second twelve months of life a Kaleidoscope of growth. Perigee Books.
Chicago-čujuhus (17. p.)Caplan, Frank. The Second Twelve Months of Life a Kaleidoscope of Growth. Perigee Books, 1977.
MLA-čujuhus (9. p.)Caplan, Frank. The Second Twelve Months of Life a Kaleidoscope of Growth. Perigee Books, 1977.
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