Kraus, R. G. (1977). Recreation Today: Program Planning And Leadership / Richard G. Kraus. Goodyear.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKraus, Richard G. Recreation Today: Program Planning And Leadership / Richard G. Kraus. Goodyear, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKraus, Richard G. Recreation Today: Program Planning And Leadership / Richard G. Kraus. Goodyear, 1977.
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