# BicepValueFactoryProxy.referenceExpression

- Module: [Aspire.Hosting.Azure.Provisioning](/reference/api/typescript/aspire.hosting.azure.provisioning.md)
- Defined on: [BicepValueFactoryProxy](/reference/api/typescript/aspire.hosting.azure.provisioning/bicepvaluefactoryproxy.md)
- Version: `13.6.0-preview.1.26478.8`
- Kind: `method`

Creates a Bicep parameter reference for an Aspire reference expression.

## Definition

```typescript
interface BicepValueFactoryProxy {
  // ... omitted for brevity
  referenceExpression(
      expression: ReferenceExpression,
      bicepIdentifier?: string,
      isSecure?: boolean): BicepValueProxy;
}
```

## Signature

```typescript
referenceExpression(
    expression: ReferenceExpression,
    bicepIdentifier?: string,
    isSecure?: boolean): BicepValueProxy
```

## Parameters

- `expression` (`ReferenceExpression`)
- `bicepIdentifier` (`string`) `optional`
- `isSecure` (`boolean`) `optional`

## Returns

[BicepValueProxy](/reference/api/typescript/aspire.hosting.azure.provisioning/bicepvalueproxy.md)

## Defined on

- [BicepValueFactoryProxy](/reference/api/typescript/aspire.hosting.azure.provisioning/bicepvaluefactoryproxy.md) -- `handle`