1920 1849 1806 1305 1294 1607 1744 1522 1448 1438 1937 1592 1699 1932 1052 1295 1563 1158 1803 1884 1242 1912 1702 1174 1186 1320 1769 1776 1545 1660 1322 1570 1099 1253 1191 2000 1627 1420 1344 1479 1207 1653 1711 1443 1136 1854 1058 1343 1151 1060 1733 1777 1971 1689 1792 1845 1967 1975 1927 1934 1521 1521 1210 1738 1460 1704 1859 1552 1678 1144 1408 1468 1488 1051 1860 1478 1772 1960 1863 1343 1495 1514 1528 1183 1306 1674 1317 1087 1584 1219 1123 1823 1696 1878 1479 1880 1269 1328 1460 http://library.phcsuphan.ac.th/search.usisassist.php?fromrefcode=&keyword=%20Social%20sciences%20Research%20Methodology.มีปัญหาในการเชื่อมต่อ/Connection Problems (open url)