Watson, Alan
Princeton University Press, 1975
Buku Teks
Nash, Ernest
Frederick A. Praeger, [1961-62]
Buku Referensi
Jaclyn Neel
Wiley-Blackwell, 2017
Buku Teks
Schulz, Fritz
Clarendon Press, 1956
Buku Teks
Buckland, W.W.
At The University Press, 1957
Buku Teks SO