Auping, John, author
AESOP Publications, 2018
Buku Teks
The New York Academy of Sciences, 1991
Buku Teks
Maudlin, Tim, author
Blackwell, 1994
Buku Teks
Maudlin, Tim, author
Blackwell, 1994
Buku Teks
Sproull, Robert L., author
John Wiley & Sons, 1963
Buku Teks