(1973). The external degree / Cyril O. Houle ; foreword by Samuel B. Gould ; epilogue by John Summerskill.
Citazione stile Chigago Style (17a edizione)The External Degree / Cyril O. Houle ; Foreword by Samuel B. Gould ; Epilogue by John Summerskill. 1973.
Citatione MLA (9a ed.)The External Degree / Cyril O. Houle ; Foreword by Samuel B. Gould ; Epilogue by John Summerskill. 1973.
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