input: [SCHOLARLY] Always include a list of cited references [POPULAR] Do not cite references [0] 
output: References
options: R e f e r e n c e s
options: C o n t e n t
options: F o r m a t
options: A u t h o r s h i p
options: L a n g u a g e
options: A p p e a r a n c e
options: P u b l i s h e r s