Hoze 2011. 12. 12. 19:38
http://hoze.tistory.com/363에서 소개한 책 40 쪽에서

Lists of short items (without main verbs) should be introduced by a full 
sentence and have the following features: 
- introductory colon 
- no initial capitals 
- no punctuation (very short items) or comma after each item 
- a full stop at the end. 

Where each item completes the introductory sentence, you should: 
- begin with the introductory colon; 
- label each item with the appropriate bullet, number or letter; 
- end each item with a semicolon; 
- close with a full stop. 

If all items are complete statements without a grammatical link to the 
introductory sentence, proceed as follows: 
a. introduce the list with a colon; 
b. label each item with the appropriate bullet, number or letter; 
c. start each item with a lowercase letter; 
d. end each one with a semicolon; 
e. put a full stop at the end. 

If any one item consists of several complete sentences, announce the list with a complete sentence and continue as indicated below: 
1) Introduce the list with a colon. 
2) Label each item with the appropriate bullet, number or letter. 
3) Begin each item with a capital letter. 
4) End each statement with a full stop. This allows several sentences to be included under a single item without throwing punctuation into confusion. 

공통점 한 가지가 있는데, 도입문이 쌍점(colon)으로 끝난다.